Abstract: A system for establishing within a communication network a conversation group between a number of hearing aids (1, 2; 3, 4, 5) used by different users, comprises a number of hearing aids (1, 2, 3, 4, 5) adapted for wireless communication, means for detecting hearing aids (1, 2, 3, 4, 5) available for participation in the communication network, means for selecting hearing aids for participation (1, 2, 3, 4, 5) in said network, and a shared wireless communication unit (10) adapted for transmitting to and from the hearing aids (1, 2; 3, 4, 5) participating in said communication network. The invention further provides a method for establishing a conversation group.

Abstract: A wearable EEG monitor for continuously monitoring the EEG of a user through capacitive coupling to an ear canal of a user comprises an ear insert (1) for positioning within the human ear canal, comprising at least two capacitive electrodes (16) for recording a signal. The electrodes are coated with a dielectricum for electrical insulation. The electrodes are connected to an amplifier (17). The amplifier has an input impedance matched to the impedance of the electrodes. The invention further provides a method of monitoring brain waves.

Abstract: A personal hearing aid (1) is adapted to be carried at the head of a person. The hearing aid comprises an EEG sensor part having electrodes (3) for measuring EEG responses from said person. The hearing aid comprises an EEG signal analyzer (5, 5?) adapted for having an EEG signal transferred from the EEG sensor part, and adapted for monitoring the EEG response. The hearing aid (1) further comprises EEG stimuli controlling means adapted for performing at least one of the following: providing a stimulus to the person, requesting the person to perform a stimuli creating act, or identifying a stimuli creating ambient sound. The hearing aid comprises EEG response detection means for identifying an induced response from the EEG response caused by the stimuli, and a classifier for deciding based on said induced response if the electrodes receive EEG responses. The invention further provides a method of adjusting a hearing aid.

Abstract: A hearing aid system adapted for establishing a conversation group with other hearing aid systems used by different users, comprises a hearing aid (1, 2, 3, 4, 5) with an associated relay device (11, 12, 13, 14, 15). The relay device is (11, 12, 13, 14, 15) adapted for wireless communication (21, 22, 23, 24, 25) with said hearing aid and for wireless communication (31, 32, 33, 34, 35) with a second hearing aid system. The relay device (11, 12, 13, 14, 15) is also adapted for receiving and displaying information about said second hearing aid systems being available for participation in said conversation group, and it comprises means for selection of said other hearing aid systems for inclusion into the conversation group. The invention further provides a method for establishing a conversation group among hearing aid users.

Abstract: An ear plug (200) comprises a shell (206) with at least two electrodes (201-205) adapted for measuring brain wave signals, said electrodes (201-205) being connected with means for processing the measured signals, wherein the contours of the outer surface of the ear plug (200) and the electrodes (201-205) are individually matched to at least part of the ear canal and the concha of the user. The invention further provides a method for producing an ear plug.

Abstract: A hearing aid comprises an amplifier (303, 309, 317), an input transducer (301), an output transducer (824) and a signal processing device (825). The amplifier (303, 309, 317) and the signal processing device (825) are connected. The hearing aid further comprises at least two electrodes (201-205) adapted for detecting electrical signals such as brain waves, the at least two electrodes (201-205) being connected to a differential amplifier (303, 309, 317), which in turn is connected to the signal processing device, and means for modifying the operation of said hearing aid in dependence of the detected signals. The invention further provides a method for adaptation of a hearing aid.

Abstract: A hearing aid comprising a time domain codec. The codec comprises a decoder adapted to generate a decoded output signal based on an input quantization index and an encoder for generating an output quantization index based on an input signal, said encoder comprising said decoder and a predictor receiving an excitation signal derived from said decoder output signal and outputting a prediction signal. The output quantization index is determined by repeated decoding of the quantization indices in order to minimize the error between the input signal and the prediction signal, and the predictor uses a recursive autocorrelation estimate for the error minimization. The invention further provides a method of encoding an audio signal.

Abstract: A system for establishing within a communication network a conversation group between a number of hearing aids (1, 2; 3, 4, 5) used by different users, comprises a number of hearing aids (1, 2, 3, 4, 5) adapted for wireless communication, means for detecting hearing aids (1, 2, 3, 4, 5) available for participation in the communication network, means for selecting hearing aids for participation (1, 2, 3, 4, 5) in said network, and a shared wireless communication unit (10) adapted for transmitting to and from the hearing aids (1, 2; 3, 4, 5) participating in said communication network. The invention further provides a method for establishing a conversation group.

Abstract: A hearing aid system adapted for establishing a conversation group with other hearing aid systems used by different users, comprises a hearing aid (1, 2, 3, 4, 5) with an associated relay device (11, 12, 13, 14, 15). The relay device is (11, 12, 13, 14, 15) adapted for wireless communication (21, 22, 23, 24, 25) with said hearing aid and for wireless communication (31, 32, 33, 34, 35) with a second hearing aid system. The relay device (11, 12, 13, 14, 15) is also adapted for receiving and displaying information about said second hearing aid systems being available for participation in said conversation group, and it comprises means for selection of said other hearing aid systems for inclusion into the conversation group. The invention further provides a method for establishing a conversation group among hearing aid users.